Cooler is the older brother of Frieza, and the son of King Cold.
Cooler has the same techniques as Frieza but are far stronger.Cooler can gather ki faster than his brother.Cooler is more physically stronger than his brother.During Cooler's battle with Goku.Cooler was able to tank Goku's Kamehameha Wave at point blank range.Not only that, he managed easily outclassed Goku in his base form.Unlike his brother, Cooler has an additional form, which makes way stronger than his previous form.
Here are a few of the techniques.
Darkness Eye Beam-Eye Lasers of Chi
Supernova: Cooler gathers massive amounts of chi in seconds creating a supernova.
Death Ball: a technique of a spark of chi, that can grow to a size of a small moon.
Cooler considers destroying the sun, in order to cause Earths inhabitants to freeze to death. When Goku blasts him to the sun.
Super Stregnth 4000 tons